What is the normal cause of 'hiss' in a speaker? I have recently bought Eltax fronts, rears and centre speakers and connected them to my SA-AX730 Technics Amp and now I'm getting quite bad hiss from all speakers. My fronts are connected to the same terminals as my previous speakers and I never had hiss from them. I'm using the screw down method of connecting the speaker to the cable - (though the speaker will allow me to use banana's) and the spring clip method at the back of the amp for the rear and centre, the fronts are using banana's. My cable and interconnectors aren't great - just the usual that come with the kit - but I've not had the problem before. Any ideas?